Furnace



R. MARX.

FURNACE.

APPLICATION men 00117, 1912.

Patented June 20, 1922.

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UNITED STATES PATENT OFFICE.

RIGHARD MARX, 0F DETROIT, MICHIGAN.

FURNACE.

To all whom it may concern:

Be it known that I, RICHARD MARX, a citizen of the United States of America, residin at Detroit, in the county of WVayne and gtate of Michigan, have invented certain new and useful Improvements in Furnaces, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention aims to furnish a furnace with novel aprons or deflectors that may be easily and quickly installed about a fire pot or combustion chamber to retard the upward flow of cold air by the fire pot or combustion chamber and thus give the cold air sufficient time to be heated or commingle with hot air in the upper part of the furnace. The aprons or deflectors provide walls that will be heated and cold air will impinge against the outer apron, while the inner apron will serve as a deflector. The apron or deflector walls will direct heated air upwardly into the path of the cold air so as to commingle with the same and provide a constant supply of heated air for distribution by the furnace.

The construction entering into my inven tion will be hereinafter described, and refer ence will now be had to the drawing showing a vertical sectional view of a conven tional form of hot air furnace provided with aprons or deflectors by which the above results may be attained.

In the drawing, there is shown a conventional form of furnace including a base 1 supporting an outer casing or shell 2 having a cold air inlet duct or flue 3 and hot air distributing ducts or flues 4:. On the base 1 within the outer casing 2, is an ash chamber 5 having a doorway 6 and above the ash chamber 5 is a fire box or pot 7, and a grate 8. Mounted on the fire box or pot 7 is a combustion chamber 9 having a doorway 10 and an exhaust flue or chimney 11. In this type of furnace, the ash chamber 5 affords an annular ledge or support 12 about the lower end of the fire box 7, and it is on this ledge or support that I place annular aprons or deflectors 13 and 14.

The aprons or deflectors are inverted frusto-conical shape, with the deflector 13 larger than the deflector 14 particularly in depth and the'walls of the deflector 13 are at a more acute angle than the walls of the deflector 14., so that when these deflectors Specification of Letters Patent. Patented June 20, 1922,

Application filed October '7, 1918.

Serial No. 257,123.-

separate elements and while the preferred shape of deflector has been shown and described, it is to be understood that the same may be varied, without departing from the scope of the appended claims.

What I claim is i 1. In a hot air furnace having a fire box and a cold air flue adapted to admit cold air to a furnace, inverted frusto-congical' shaped deflectors, about the fire box, each supported by the fire box with the lower ends thereofadjoining and closed to cold air and adapted to provide annular coinpa'rtments having upper open ends adjacent the fire box and from which the cold-air is excluded.

2. The combination with a furnace having a fire box and a cold air inlet flue, of a deflector surrounding said fire box and extending outwardly to form a compartment adj acent said fire box which has its lower end closed by said deflector engaging the fire box of the furnace and from which cold air is excluded during the operation of the furnace.

3. The combination with a furnace having an ash chamber and fire box, of inverted frusto-conical shape deflectors seated on the ash chamber of said furnace and retained thereon by the fire box of said furnace, and extending upwardly and outwardly from said fire box, said deflectors being one larger than the other with the lower ends thereof adjoining and providing annular compartments about the fire box closed at thebot- I in the presence of two witnesses.

MARX.

. RICHARD Witnesses:

ARTHUR Gr. MARX, KARL H. BUTLER. 

